Malicious PDF — malware analysis report

Static analysis result for SHA-256 089cf5ea9da35342…

MALICIOUS

PDF

85.5 KB Created: 2021-03-06 23:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 20514deb3cea5360e9eee36f5a7e8cf5 SHA-1: b09abdca75b7c692e038f43a1e24fe89c4a7dc7c SHA-256: 089cf5ea9da35342deb6805dabef613a5ba6e8c5c6eb3179b551cb78a525272c
284 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external sites, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document likely instructs the user to copy and paste commands into a shell, a common technique for downloading and executing further malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/wix?keyword=office+product+key+lookup In PDF document text
    • http://jojazinex.mygamesonline.org/tecnicas_de_redaccion_concordancia.pdfIn PDF document text
    • https://mufewikusa.weebly.com/uploads/1/3/4/0/134042586/biduruwezovu.pdfIn PDF document text
    • https://cdn.sqhk.co/gazegarov/ggjfqUH/twisty_road_app_store.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/iahgigf/teppen_dante_deck_build.pdfIn PDF document text
    • http://bachanalytics.com/netepuxawemejwzm9m.pdfIn PDF document text
    • https://cdn.sqhk.co/genamudazunu/geGzVvh/angry_birds_pop_bubble_shooter_hack_apk.pdfIn PDF document text
    • http://prodit.space/firex_120-890b_manualur9px.pdfIn PDF document text
    • https://cdn.sqhk.co/losegiro/gimdhgc/8031793239.pdfIn PDF document text
    • https://gapidekejoz.weebly.com/uploads/1/3/4/8/134876705/09f86e83f8.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/48d289.pdfIn PDF document text
    • https://zuzivosojix.weebly.com/uploads/1/3/0/7/130775151/fisarapitel.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/tarudutu.pdfIn PDF document text
    • https://vamubediva.weebly.com/uploads/1/3/4/9/134901044/a941490bf.pdfIn PDF document text
    • http://madewithsunshine.com/kipesuk2g8ep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7a20cb3b-96c1-46ac-9a14-cc6584e4076d/38674904540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fca5428d-7acb-407a-9bd2-0fec2d683b78/how_does_a_navien_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa3e0ec6-e42a-45d6-8fa9-31f64a0d0be3/plantronics_voyager_legend_firmware_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd82e276-3cf8-4ab8-8ade-66fb5417bfd4/how_the_grinch_stole_christmas_plot_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc54e5e-cb91-4c8a-884d-46318b3553c6/lulagimexisufafesisokuwu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10479 4732 bytes
SHA-256: b42d278940c20981ef0538fed3268e76c899185e9620122c1a4866dafb6ab6d0
font_01_sfnt_off000114b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B4 11048 bytes
SHA-256: 61c62ac3e14a13b494a073ef6ad76592f2d7659138c077d528854c8835ac1c56
font_02_sfnt_off00013a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A64 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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